US3350088A - Workpiece positioning mechanism for a machine tool - Google Patents

Workpiece positioning mechanism for a machine tool Download PDF

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Publication number
US3350088A
US3350088A US467030A US46703065A US3350088A US 3350088 A US3350088 A US 3350088A US 467030 A US467030 A US 467030A US 46703065 A US46703065 A US 46703065A US 3350088 A US3350088 A US 3350088A
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US
United States
Prior art keywords
rails
screw
workpiece
supported
positioning mechanism
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US467030A
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English (en)
Inventor
Arthur K Schott
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Houdaille Industries Inc
Original Assignee
Houdaille Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Houdaille Industries Inc filed Critical Houdaille Industries Inc
Priority to US467030A priority Critical patent/US3350088A/en
Priority to CH918666A priority patent/CH454578A/de
Priority to BE683099D priority patent/BE683099A/xx
Priority to DE19661552621 priority patent/DE1552621A1/de
Priority to GB28646/66A priority patent/GB1096284A/en
Application granted granted Critical
Publication of US3350088A publication Critical patent/US3350088A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
    • B21D28/265—Perforating, i.e. punching holes in sheets or flat parts with relative movement of sheet and tools enabling the punching of holes in predetermined locations of the sheet, e.g. holes punching with template
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/04—Centering the work; Positioning the tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/003—Positioning devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/654—With work-constraining means on work conveyor [i.e., "work-carrier"]
    • Y10T83/6563—With means to orient or position work carrier relative to tool station

Definitions

  • This invention relates generally to machine tools, and more particularly to a workpiece positioning mechanism which is particularly adapted to move a workpiece in two axes to various positions so as to be operated on by a punching machine, the punching machine and the motors of the positioning mechanism being under the control of a numerical control device.
  • the positioning mechanism In machines of this type, it is considered essential that the positioning mechanism not obstruct access to the tooling so that the same may be conveniently changed. Therefore, it is necessary that such mechanism extend through the throat of the press frame. Accordingly, the throat size must be sufficiently large to accommodate not only the workpiece, but to accommodate such positioning mechanism.
  • a workpiece positioning mechanism wherein that portion of the mechanism which extends through the throat of the press is unusually short in the direction in which the throat opens, namely in the direction of the length of the throat.
  • the necessary drive mechanisms for this element are located outside of the throat, and yet the portion of the throat occupied by such positioning mechanism is unusually small.
  • a further object of the present invention is to provide a workpiece positioning mechanism wherein very little of the effective throat size of the machine is occupied by such positioning mechanism.
  • FIG. 2 schematic illustration of FIG. 2
  • FIG. 4 is an enlarged cross-sectional view of a fragmentary portion of the positioning mechanism, taken along line IVIV of FIG. 3;
  • FIG. 5 is a front elevational View, partly broken away, of the workpiece positioning mechanism
  • FIG. 6 is an enlarged cross-sectional view taken along line Vl-VI of FIG. 5;
  • FIG. 7 is a cross-sectional view of a workpiece clamp as shown in elevation in FIG. 6, and carried by the positioning mechanism.
  • the principles of this invention are particularly useful when embodied in a machine tool such as a punching machine, illustrated and generally indicated in FIG. 1 by the numeral 10.
  • the machine tool 10 includes a generally C-shaped frame 11 having a lower arm 12 and an upper arm 13 vertically spaced therefrom so as to define a laterally opening C-shaped configuration.
  • the frame 11 has a laterally opening throat 14, the open end of which constitutes the front of the machine, and the throat being open at its sides.
  • Frame 11 further includes a vertical portion 15 which joins together the spaced upper and lower arms 13, 12, and a workpiece-supporting table 16 and is disposed within the throat l4 and extends laterally therefrom, both in a forward direction, to the left, and to the right.
  • a portion of the table 16 extends beyond opposite sides of the vertical portion 15 of the frame 11.
  • the lower arm 12 supports a die (not shown) and the upper portion or upper arm 13 supports a reciprocable punch 17 for cooperation with the die, the punch being carried within a punch holder 18, and vertically reciprocated by means not shown.
  • a motor 21 acts through a pair of belts 22 to drive a pulley 23 connected to an eccentric for reciprocating the punch 17. From time to time, as may be desired, the punch 17 and the die are changed in accordance with work requirements.
  • a workpiece is normally disposed within the throat 14 between the punch and die means, and is held by a workpiece clamp 25, shown in greater detail in FIGS. 6 and 7.
  • the workpiece clamp 25 is secured to a workpiece positioning mechanism generally indicated at 26, the same being more fully illustrated in FIGS. 2-6.
  • the workpiece positioning mechanism 26 includes an elongated horizontally extending rail assembly 27.
  • rail assembly 27 includes a pair of vertically spaced rails 28, 29, a workpiece holder 30 supported by the rails 28, 29 for movement along the length of the rails, a first rotatably supported screw 31 which extends parallel to the rails 28, 29 which is disposed at a height vertically intermediate the rails 28, 29, and which has a driving connection 32 with the workpiece holder 30.
  • a first reversible motor 33 is drivingly connected to the screw 31 to rotate it in either direction, and hence to reciprocate the workpiece holder 30 along the rails 28, 29.
  • the elongated rail assembly 27 is supported for horizontal movement in a direction perpendicular to its length, such support being provided by a further pair of rails 34,
  • a second horizontal screw 36 is rotatably supported on the frame 11, and has a driving connection 37 with the rail assembly 27.
  • a second reversible motor 38 is drivingly connected to the screw 36 to rotate it, and hence to reciprocate the rail assembly 27 on the stationary rails 34, 35.
  • the workpiece holder 30 has a front face 39 adapted as described below for supporting a workpiece.
  • the slot 40 may lie at either side of the vertical portion of the frame 11, or may be centrally located so that all of the components associated therewith are completely enclosed by the frame 11.
  • the structure associated with the motordriven screw 36 and the driving connection 37 is shown in FIG. 3.
  • the frame 11 includes a vertical wall 41 having a groove 42 within which there is disposed a number of stand-off members or spacers 43 which support a still further rail 44, also referred to herein as a third rail.
  • the screw 36 is supported at its ends by a pair of bearings 45, 46 carried by the frame, the screw 36 having a pulley 47 driven by the motor 38 through a pulley 48 and a belt 49.
  • a sensing element 50 is corotatably connected to the shaft 36 for transmitting suitable signals to the tape controlled mechanism.
  • connection 37 between the screw 36 and the rail assembly 27 includes a conventional ball nut 51 supported by a casing 52 and driven by the threads of the screw 36.
  • the casing 52 has an upwardly projecting pin 53 received in a suitable opening in the rail assembly 27.
  • the casing 52 includes a pair of conventional ball bushings 54, 54 by which the connection means 37 is supported on the third rail 44, and by which the forces on the screw means 36 are minimized.
  • a shield 55 of bellows form is provided to protect the screw 36.
  • the elongated horizontally extending rail assembly 27 includes a channel member 56 supported at its ends on the side rails 34, 35.
  • the channel member 56 includes a horizontally opening channel 57 to define a horizontally opening C-shaped cross section, the upper arm 58 of which supports the rail 28, and the lower arm 59 of which supports the lower rail 29.
  • the connection 32 between the workpiece holder 30 and the screw 31 includes a rearwardly projecting ear 59 within which there is disposed a conventional ball nut assembly 60, carried by such extension 59 and coacting with the threads of the screw 31.
  • the front face 39 of the workpiece holder 30 has a vertical extent which is at least as great as the vertical spacing between the rails 28, 29, such face being adapted to hold the workpiece clamp 25.
  • Such adaptation in this embodiment is provided by a T-shaped slot 61 receptive of a T-shaped clamping block 62 carried by the workpiece clamp 25.
  • the front face 39 of the workpiece holder 30 is also provided with a calibrated scale 63 disposed in recessed relation.
  • the channel member 56 supports a number of limit switches 64 having plungers 65 engaged by appropriately positioned cams 66 carried on the workpiece holder 30.
  • the screw 31 is rotatably supported at its ends by a pair of bearings 67, 68 carried by the channel member 56, the screw 31 being rotatably driven by the motor 33 acting through a pulley 69, a belt 70 and a pulley 71.
  • the screw 31 is also corotatably connected to a suitable follow-up or sensing device 72 for indicating its position to the tape controlled means.
  • the workpiece holder 30 is provided with a number of ball bushings 73 by which it is supported on the rails 28, 29.
  • the workpiece clamp 25 shown in FIG. 7 includes a housing 74 having a stationary finger 75 and a centrally pivoted finger 76 between which fingers 75, 76 the workpiece is received.
  • the finger 76 is pivoted about a pin 77 by means of a vertical plunger 78 having a pin and slot connection therewith.
  • the finger 76 is biased to an open position by a spring 79 acting between it and the housing 74.
  • An eccentric or cam 80 having a handle 81 shown in FIG. 6 bearing against a wearplate 82 and adjustably connected to the plunger 78 can be rotated to close and open the gap between the fingers 75 and 76.
  • the T-shaped clamping blocks 62 are provided with suitable clearance so that the clamping means 25 may be adjusted vertically by a slight amount with respect thereto.
  • a further spring 83 acts between the housing 74 and the block 62, while a screw 84 having a jam nut 85 may be positioned to raise and 4 lower the housing 74 with respect to the respective block 62.
  • the motor 38 thus drives the rail assembly 27 in a direction perpendicular to its length to move the workpiece carried by the workpiece holder 30 to a position sensed by the means 50, while the motor 33 moves the workpiece holder to a position along the length of the vertically spaced rails 28, 29 to a position sensed by the means 72.
  • the vertical alignment and spacing of the rails 28, 29 enables the use of a relatively heavy and massive channel member 56 and a relatively heavy or massive workpiece holder 30 for relatively heavy duty work, while such components occupy a minimum amount of the throat 14 of the machine tool 10.
  • a workpiece positioning mechanism for a machine tool comprising in combination:
  • a workpiece positioning mechanism in a machine tool having spaced upper and lower arms joined together by a vertical portion so as to define a frame with a C- shaped configuration having a laterally opening throat, comprising in combination therewith:
  • a workpiece positioning mechanism for a machine tool comprising in combination:
  • (g) means providing a driving connection between said second screw and said vertically spaced rails, and supported by said third rail.
  • a workpiece positioning mechanism for a machine tool comprising in combination:
  • a workpiece positioning mechanism for a machine tool comprising in combination:
  • a workpiece positioning mechanism for a machine tool comprising in combination:
  • a workpiece positioning mechanism for a machine tool comprising in combination:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machine Tool Units (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US467030A 1965-06-25 1965-06-25 Workpiece positioning mechanism for a machine tool Expired - Lifetime US3350088A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US467030A US3350088A (en) 1965-06-25 1965-06-25 Workpiece positioning mechanism for a machine tool
CH918666A CH454578A (de) 1965-06-25 1966-06-24 Werkstückeinstellmechanismus für eine Werkzeugmaschine
BE683099D BE683099A (forum.php) 1965-06-25 1966-06-24
DE19661552621 DE1552621A1 (de) 1965-06-25 1966-06-24 Werkstueckeinstellmechanismus fuer Werkzeugmaschinen
GB28646/66A GB1096284A (en) 1965-06-25 1966-06-27 Workpiece positioning mechanism for a machine tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US467030A US3350088A (en) 1965-06-25 1965-06-25 Workpiece positioning mechanism for a machine tool

Publications (1)

Publication Number Publication Date
US3350088A true US3350088A (en) 1967-10-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
US467030A Expired - Lifetime US3350088A (en) 1965-06-25 1965-06-25 Workpiece positioning mechanism for a machine tool

Country Status (5)

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US (1) US3350088A (forum.php)
BE (1) BE683099A (forum.php)
CH (1) CH454578A (forum.php)
DE (1) DE1552621A1 (forum.php)
GB (1) GB1096284A (forum.php)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3436998A (en) * 1966-10-21 1969-04-08 Warner Swasey Co Table assembly
FR2315366A1 (fr) * 1975-06-23 1977-01-21 So Fine Precision Sheet Metal Machine pour executer des trous
US4288680A (en) * 1979-03-08 1981-09-08 R + S Stanzformen Gmbh Apparatus for cutting mould notches for strip steel cutting tools
DE3339340A1 (de) * 1982-11-02 1984-05-03 Amada Co. Ltd., Isehara, Kanagawa Stanzpresse
US4589317A (en) * 1983-12-30 1986-05-20 U.S. Amada Limited Sheet or plate material machining equipment
DE3826827A1 (de) * 1988-08-06 1990-02-08 Behrens Ag C Vorrichtung zum positionieren von werkstuecken
CN102139308A (zh) * 2011-03-02 2011-08-03 浙江博雷重型机床制造有限公司 一种数控冲孔机床
CN111112441A (zh) * 2019-12-27 2020-05-08 江苏万成机械制造有限公司 一种带有清理装置的汽车车身冲压装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2511901A1 (fr) * 1981-08-28 1983-03-04 Libaud Procedes Ateliers Berna Dispositif de prehension perfectionne pour machines poinconneuses
CN106180353A (zh) * 2016-08-29 2016-12-07 无锡市美峰橡胶制品制造有限公司 一种去边机
CN107186055A (zh) * 2017-07-25 2017-09-22 富士瑞鹄技研（芜湖）有限公司 一种用于板件打孔的上翻斜楔机构
CN114042803B (zh) * 2022-01-14 2022-04-22 小洋电源股份有限公司 适用于蓄电池板栅的冲孔设备

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2958247A (en) * 1957-05-07 1960-11-01 Itt Pattern control positioning a work piece and a tool turret for automatic operation
US3145605A (en) * 1961-01-16 1964-08-25 Zealand Engineering Company Lt Apparatus for setting up and tooling workpieces

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2958247A (en) * 1957-05-07 1960-11-01 Itt Pattern control positioning a work piece and a tool turret for automatic operation
US3145605A (en) * 1961-01-16 1964-08-25 Zealand Engineering Company Lt Apparatus for setting up and tooling workpieces

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3436998A (en) * 1966-10-21 1969-04-08 Warner Swasey Co Table assembly
FR2315366A1 (fr) * 1975-06-23 1977-01-21 So Fine Precision Sheet Metal Machine pour executer des trous
US4288680A (en) * 1979-03-08 1981-09-08 R + S Stanzformen Gmbh Apparatus for cutting mould notches for strip steel cutting tools
DE3339340A1 (de) * 1982-11-02 1984-05-03 Amada Co. Ltd., Isehara, Kanagawa Stanzpresse
US4589317A (en) * 1983-12-30 1986-05-20 U.S. Amada Limited Sheet or plate material machining equipment
DE3826827A1 (de) * 1988-08-06 1990-02-08 Behrens Ag C Vorrichtung zum positionieren von werkstuecken
CN102139308A (zh) * 2011-03-02 2011-08-03 浙江博雷重型机床制造有限公司 一种数控冲孔机床
CN111112441A (zh) * 2019-12-27 2020-05-08 江苏万成机械制造有限公司 一种带有清理装置的汽车车身冲压装置

Also Published As

Publication number Publication date
CH454578A (de) 1968-04-15
DE1552621A1 (de) 1970-01-08
BE683099A (forum.php) 1966-12-01
GB1096284A (en) 1967-12-29

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